package com.chen.util;

import java.util.Random;

public class KeyUtil {

    /*生成唯一的主键 格式：时间+随机数*/
    public static synchronized String genUniqueKey(){
        Random random =new Random();

        Integer number = random.nextInt(900000) + 100000;

        return System.currentTimeMillis() + String.valueOf(number);
    }
}
